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03/03/2021 10:49 pm
Topic starter
I have a 2010 cobalt with 92000 miles. When I start it in the morning it idles way to high and then after about a minute or two it idles fine. I have a code P0138 O2 sensor High voltage bank 1 sensor 2. The questions I have are, where is it located on a cobalt? Is this most likely causing my rough idle? Is it something I should I have a pro check before I purchase a sensor or should I just install it because the code?
2 Answers
1
03/03/2021 10:56 pm
that would be the sensor downstream of the cat. Inspect the wiring and the connector to make sure the connection is good. If it's bad go ahead an replace it.
https://www.youtube.com/watch?v=M55qmlHZmko
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03/03/2021 10:55 pm
Start here -
https://www.engine-codes.com/p0138_chevrolet.html
Then read the FAQ section of this website.
